HP LASERJET ENTERPRISE M725dn Troubleshooting Manual page 22

Product upgrades ................................................................................................................. 468
Appendix A Service and support ..................................................................................... 471
Hewlett-Packard limited warranty statement ............................................................................. 472
HP's Premium Protection Warranty: LaserJet toner cartridge limited warranty statement ................. 474
HP policy on non-HP supplies ................................................................................................ 475
HP anticounterfeit Web site ................................................................................................... 476
Data stored on the toner cartridge .......................................................................................... 477
End User License Agreement .................................................................................................. 478
OpenSSL ............................................................................................................................. 481
Customer self-repair warranty service ..................................................................................... 482
Customer support ................................................................................................................. 483
Appendix B Product specifications ................................................................................... 485
Physical specifications .......................................................................................................... 486
Power consumption, electrical specifications, and acoustic emissions .......................................... 486
Environmental specifications .................................................................................................. 486
xx
Checklist for solving fax problems ........................................................................... 455
What type of phone line are you using? .................................................... 455
Are you using a surge-protection device? .................................................. 455
Are you using a phone company voice-messaging service or an answering
machine? .............................................................................................. 456
Does your phone line have a call-waiting feature? ...................................... 456
Check fax accessory status ..................................................................................... 457
General fax problems ............................................................................................ 458
Use Fax over VoIP networks .................................................................................... 459
Problems with receiving faxes ................................................................................. 460
Problems with sending faxes ................................................................................... 462
Fax error codes .................................................................................................... 464
Fax error messages on the product control panel ...................................................... 464
Send-fax messages ................................................................................. 465
Receive-fax messages ............................................................................. 466
Service settings ..................................................................................................... 467
Settings in the Troubleshooting menu ........................................................ 467
Determine the installed revision of firmware .............................................................. 468
Perform a firmware upgrade ................................................................................... 468
Embedded Web Server ........................................................................... 468
USB storage device (Preboot menu) .......................................................... 469
USB storage device (control-panel menu) ................................................... 470
ENWW